Agriculture & Biology
ammonium
12%
ammonium nitrate
22%
animal manures
25%
application rate
6%
arable soils
7%
calcium ammonium nitrate
10%
clay soils
38%
corn
10%
crops
7%
dairy cattle
6%
dithionite
18%
farmers
18%
farms
7%
fertilizer application
25%
fertilizers
30%
forage crops
31%
genetic trend
7%
grasses
23%
grasslands
100%
growing season
8%
intensive farming
17%
laws and regulations
13%
leaching
12%
liquid fertilizers
9%
liquid manure
9%
liquids
18%
mineral fertilizers
27%
minerals
19%
Netherlands
43%
nitrates
16%
nitrogen
15%
nitrogen fertilizers
24%
NPK fertilizers
16%
nutrients
9%
oxalates
15%
peat soils
18%
permanent grasslands
17%
phosphorus
39%
pig manure
31%
rock phosphate
16%
sandy soils
21%
soil
20%
soil fertility
12%
soil minerals
8%
soil organic matter
12%
soil types
13%
springs (water)
8%
surface water
14%
topsoil
29%
yield components
26%
Earth & Environmental Sciences
agricultural modeling
18%
ammonia
21%
ammonium
11%
ammonium nitrate
30%
calcium
5%
clay soil
35%
climate change
9%
climate change adaptation
30%
crop
14%
farm
10%
fertilizer
59%
fertilizer application
31%
field experiment
16%
forage
9%
forage crop
42%
grassland
45%
growing season
9%
intensive agriculture
17%
leaching
10%
liquid
16%
literature review
5%
loss
9%
maize
14%
manure
51%
mineral
29%
mineral fertiliser
41%
modeling
6%
nitrate
18%
nitrogen
25%
nitrogen oxides
5%
nitrous oxide
5%
oxalate
15%
peat soil
16%
phosphate rock
16%
phosphorus
19%
pig
26%
qualitative analysis
6%
replacement
25%
residual soil
8%
sandy soil
20%
slurry
25%
soil
20%
soil fertility
14%
soil test
16%
surface water
9%
topsoil
25%
trend
13%
trial
5%
triangulation
6%